app/display.h

   1 /* Dia -- an diagram creation/manipulation program
   2  * Copyright (C) 1998 Alexander Larsson
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18 #ifndef DDISPLAY_H
  19 #define DDISPLAY_H
  20
  21 #include <gtk/gtk.h>
  22
  23 typedef struct _DDisplay DDisplay;
  24
  25 #include "geometry.h"
  26 #include "diagram.h"
  27 #include "grid.h"
  28 #include "render_gdk.h"
  29 #include "render_libart.h"
  30 #include "menus.h"
  31
  32 #define DDISPLAY_MAX_ZOOM 500.0
  33 #define DDISPLAY_NORMAL_ZOOM 20.0
  34 #define DDISPLAY_MIN_ZOOM 1.0
  35
  36 struct _DDisplay {
  37   Diagram *diagram;               /* pointer to the associated diagram */
  38
  39   GtkWidget *shell;               /* shell widget for this ddisplay    */
  40   GtkWidget *canvas;              /* canvas widget for this ddisplay   */
  41   GtkWidget *hsb, *vsb;           /* widgets for scroll bars           */
  42   GtkWidget *hrule, *vrule;       /* widgets for rulers                */
  43   GtkWidget *origin;              /* widgets for rulers                */
  44   GtkWidget *menu_bar;            /* widget for the menu bar           */
  45   GtkItemFactory *mbar_item_factory; /* item factory used to create the menu bar */
  46
  47   /* menu bar widgets */
  48   GtkWidget *rulers;
  49   GtkWidget *visible_grid;
  50   GtkWidget *snap_to_grid;
  51   GtkWidget *show_cx_pts_mitem;
  52 #ifdef HAVE_LIBART
  53   GtkWidget *antialiased;
  54 #endif
  55   UpdatableMenuItems updatable_menu_items;
  56
  57
  58   GtkWidget *snap_status;
  59   GtkWidget *zoom_status;
  60   GtkWidget *modified_status;
  61
  62   GtkAccelGroup *accel_group;
  63
  64   GtkAdjustment *hsbdata;         /* horizontal data information       */
  65   GtkAdjustment *vsbdata;         /* vertical data information         */
  66
  67   Point origo;                    /* The origo (lower left) position   */
  68   real zoom_factor;               /* zoom, 20.0 means 20 pixel == 1 cm */
  69   Rectangle visible;              /* The part visible in this display  */
  70
  71   Grid grid;                      /* the grid in this display          */
  72
  73   gboolean show_cx_pts;           /* Connection points toggle boolean  */
  74   gboolean autoscroll;
  75
  76   int aa_renderer;
  77   Renderer *renderer;
  78
  79   GSList *update_areas;           /* Update areas list                 */
  80   GSList *display_areas;          /* Display areas list                */
  81   guint update_id;                /* idle handler ID for redraws       */
  82
  83   /* input contexts */
  84   GdkIC *ic;
  85   GdkICAttr *ic_attr;
  86 };
  87
  88 extern GdkCursor *default_cursor;
  89
  90 DDisplay *new_display(Diagram *dia);
  91 /* Normal destroy is done through shell widget destroy event. */
  92 void ddisplay_really_destroy(DDisplay *ddisp);
  93 void ddisplay_transform_coords_double(DDisplay *ddisp,
  94                                       coord x, coord y,
  95                                       double *xi, double *yi);
  96 void ddisplay_transform_coords(DDisplay *ddisp,
  97                                coord x, coord y,
  98                                int *xi, int *yi);
  99 void ddisplay_untransform_coords(DDisplay *ddisp,
 100                                  int xi, int yi,
 101                                  coord *x, coord *y);
 102 real ddisplay_transform_length(DDisplay *ddisp, real len);
 103 real ddisplay_untransform_length(DDisplay *ddisp, real len);
 104 void ddisplay_add_update_pixels(DDisplay *ddisp, Point *point,
 105                                        int pixel_width, int pixel_height);
 106 void ddisplay_add_update_all(DDisplay *ddisp);
 107 void ddisplay_add_update(DDisplay *ddisp, Rectangle *rect);
 108 void ddisplay_add_display_area(DDisplay *ddisp,
 109                                int left, int top,
 110                                int right, int bottom);
 111 void ddisplay_flush(DDisplay *ddisp);
 112 void ddisplay_update_scrollbars(DDisplay *ddisp);
 113 void ddisplay_set_origo(DDisplay *ddisp,
 114                         coord x, coord y);
 115 void ddisplay_zoom(DDisplay *ddisp, Point *point,
 116                    real zoom_factor);
 117
 118 void ddisplay_set_renderer(DDisplay *ddisp, int aa_renderer);
 119 void ddisplay_resize_canvas(DDisplay *ddisp,
 120                             int width,
 121                             int height);
 122
 123 void ddisplay_render_pixmap(DDisplay *ddisp, Rectangle *update);
 124
 125 DDisplay *ddisplay_active(void);
 126 Diagram *ddisplay_active_diagram(void);
 127
 128 void ddisplay_close(DDisplay *ddisp);
 129
 130 void ddisplay_set_title(DDisplay *ddisp, char *title);
 131 void ddisplay_set_cursor(DDisplay *ddisp, GdkCursor *cursor);
 132 void ddisplay_set_all_cursor(GdkCursor *cursor);
 133
 134 gboolean ddisplay_scroll(DDisplay *ddisp, Point *delta);
 135 gboolean ddisplay_autoscroll(DDisplay *ddisp, int x, int y);
 136 void ddisplay_scroll_up(DDisplay *ddisp);
 137 void ddisplay_scroll_down(DDisplay *ddisp);
 138 void ddisplay_scroll_left(DDisplay *ddisp);
 139 void ddisplay_scroll_right(DDisplay *ddisp);
 140
 141 void display_update_menu_state(DDisplay *ddisp);
 142 void ddisplay_update_statusbar(DDisplay *ddisp);
 143 void ddisplay_do_update_menu_sensitivity (DDisplay *ddisp);
 144 /* Have to be called from interface.c */
 145 GtkPixmap *snap_status_load_images(GdkWindow *window);
 146
 147 void display_set_active(DDisplay *ddisp);
 148
 149 #endif /* DDISPLAY_H */